This technology improves cycle stability and initial capacity by doping lithium nickel oxide (LNO) with hafnium (Hf) to enhance structural stability. It optimizes the hafnium concentration distribution between the particle interior and surface using a choice of precursor, solid-state, or hybrid manufacturing methods.
Lithium nickel oxides have historically suffered from structural instability due to oxygen decomposition and phase transition to a spinel structure during repeated charge-discharge cycles. This leads to rapid capacity degradation and performance loss caused by residual lithium accumulation on the surface.
This technology utilizes a base source of hafnium oxide and lithium hydroxide. The precursor method ensures uniform doping throughout the particle for cycle stability, the solid-state method increases surface doping concentration for higher initial capacity, and the hybrid method achieves both internal penetration and surface doping. Applicable to cobalt-free high-nickel cathodes for EVs and long-range mobility batteries, it reduces reliance on expensive cobalt while effectively minimizing residual lithium.
This invention was developed with support from the Ministry of Science and ICT for research on the correlation between the physical properties of atomic-level controlled metal nanoclusters and their photoelectrochemical behavior.
N/A
